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FIG 8. Graph shows averaged ROC curves for MR imaging criteria for differentiating xerostomia patients with Sjögren’s syndrome from those without Sjögren’s syndrome, by using fat area on T1-weighted images, intact lobule area on fat-suppressed T2-weighted images, and the number and size of sialoectatic foci on MR sialograms. The Az values calculated from ROC curves, which indicate the diagnostic ability using these criteria, are as follows: Az (fat area) = 0.94 ± 0.03, Az (lobule area) = 0.98 ± 0.02, Az (number) = 0.91 ± 0.04, and Az (size) = 0.89 ± 0.04.
